Ignition plug for internal combustion engine



FIG. 1 is a perspective view of ignition plug for internal combustion engine, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a front elevation view thereof in a typical usage environment.

The broken line portion of FIG. 8 is included to show an unclaimed internal combustion engine usage environment and forms no part of the claimed design. 

I claim, the ornamental design for ignition plug for internal combustion engine, as shown and described. 